From 2fa24f92530edaf86c3b5f662464e0d2e3b3e517 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 10 Dec 2010 08:42:23 +0000 Subject: [PATCH] xfs: remove the all_bh flag from xfs_convert_page The all_bh flag is always set when entering the page clustering machinery with a regular written extent, which means the check for it is superflous. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder --- fs/xfs/linux-2.6/xfs_aops.c | 33 +++++++++++++-------------------- 1 file changed, 13 insertions(+), 20 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c index c3bc7690f043..86f57f61939b 100644 --- a/fs/xfs/linux-2.6/xfs_aops.c +++ b/fs/xfs/linux-2.6/xfs_aops.c @@ -682,8 +682,7 @@ xfs_convert_page( loff_t tindex, struct xfs_bmbt_irec *imap, xfs_ioend_t **ioendp, - struct writeback_control *wbc, - int all_bh) + struct writeback_control *wbc) { struct buffer_head *bh, *head; xfs_off_t end_offset; @@ -738,11 +737,14 @@ xfs_convert_page( continue; } - if (buffer_unwritten(bh) || buffer_delay(bh)) { + if (buffer_unwritten(bh) || buffer_delay(bh) || + buffer_mapped(bh)) { if (buffer_unwritten(bh)) type = IO_UNWRITTEN; - else + else if (buffer_delay(bh)) type = IO_DELALLOC; + else + type = IO_OVERWRITE; if (!xfs_imap_valid(inode, imap, offset)) { done = 1; @@ -752,23 +754,17 @@ xfs_convert_page( ASSERT(imap->br_startblock != HOLESTARTBLOCK); ASSERT(imap->br_startblock != DELAYSTARTBLOCK); - xfs_map_at_offset(inode, bh, imap, offset); + if (type == IO_OVERWRITE) + lock_buffer(bh); + else + xfs_map_at_offset(inode, bh, imap, offset); xfs_add_to_ioend(inode, bh, offset, type, ioendp, done); page_dirty--; count++; } else { - type = IO_OVERWRITE; - if (buffer_mapped(bh) && all_bh) { - lock_buffer(bh); - xfs_add_to_ioend(inode, bh, offset, - type, ioendp, done); - count++; - page_dirty--; - } else { - done = 1; - } + done = 1; } } while (offset += len, (bh = bh->b_this_page) != head); @@ -800,7 +796,6 @@ xfs_cluster_write( struct xfs_bmbt_irec *imap, xfs_ioend_t **ioendp, struct writeback_control *wbc, - int all_bh, pgoff_t tlast) { struct pagevec pvec; @@ -815,7 +810,7 @@ xfs_cluster_write( for (i = 0; i < pagevec_count(&pvec); i++) { done = xfs_convert_page(inode, pvec.pages[i], tindex++, - imap, ioendp, wbc, all_bh); + imap, ioendp, wbc); if (done) break; } @@ -929,7 +924,6 @@ xfs_vm_writepage( ssize_t len; int err, imap_valid = 0, uptodate = 1; int count = 0; - int all_bh = 0; int nonblocking = 0; trace_xfs_writepage(inode, page, 0); @@ -1065,7 +1059,6 @@ xfs_vm_writepage( } if (imap_valid) { - all_bh = 1; lock_buffer(bh); xfs_add_to_ioend(inode, bh, offset, type, &ioend, new_ioend); @@ -1102,7 +1095,7 @@ xfs_vm_writepage( end_index = last_index; xfs_cluster_write(inode, page->index + 1, &imap, &ioend, - wbc, all_bh, end_index); + wbc, end_index); } if (iohead) -- GitLab